
<h1><span class="yiyi-st" id="yiyi-13">numpy.ma.size</span></h1>
        <blockquote>
        <p>原文：<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.ma.size.html">https://docs.scipy.org/doc/numpy/reference/generated/numpy.ma.size.html</a></p>
        <p>译者：<a href="https://github.com/wizardforcel">飞龙</a> <a href="http://usyiyi.cn/">UsyiyiCN</a></p>
        <p>校对：（虚位以待）</p>
        </blockquote>
    
<dl class="function">
<dt id="numpy.ma.size"><span class="yiyi-st" id="yiyi-14"> <code class="descclassname">numpy.ma.</code><code class="descname">size</code><span class="sig-paren">(</span><em>obj</em>, <em>axis=None</em><span class="sig-paren">)</span><a class="reference external" href="http://github.com/numpy/numpy/blob/v1.11.3/numpy/ma/core.py#L6924-L6926"><span class="viewcode-link">[source]</span></a></span></dt>
<dd><p><span class="yiyi-st" id="yiyi-15">返回给定轴上的元素数。</span></p>
<table class="docutils field-list" frame="void" rules="none">
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<tr class="field-odd field"><th class="field-name"><span class="yiyi-st" id="yiyi-16">参数：</span></th><td class="field-body"><p class="first"><span class="yiyi-st" id="yiyi-17"><strong>a</strong>：array_like</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-18">输入数据。</span></p>
</div></blockquote>
<p><span class="yiyi-st" id="yiyi-19"><strong>axis</strong>：int，可选</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-20">对元素计数的轴。</span><span class="yiyi-st" id="yiyi-21">默认情况下，给出元素的总数。</span></p>
</div></blockquote>
</td>
</tr>
<tr class="field-even field"><th class="field-name"><span class="yiyi-st" id="yiyi-22">返回：</span></th><td class="field-body"><p class="first"><span class="yiyi-st" id="yiyi-23"><strong>element_count</strong>：int</span></p>
<blockquote class="last">
<div><p><span class="yiyi-st" id="yiyi-24">沿指定轴的元素数。</span></p>
</div></blockquote>
</td>
</tr>
</tbody>
</table>
<div class="admonition seealso">
<p class="first admonition-title"><span class="yiyi-st" id="yiyi-25">也可以看看</span></p>
<dl class="last docutils">
<dt><span class="yiyi-st" id="yiyi-26"><a class="reference internal" href="numpy.ma.shape.html#numpy.ma.shape" title="numpy.ma.shape"><code class="xref py py-obj docutils literal"><span class="pre">shape</span></code></a></span></dt>
<dd><span class="yiyi-st" id="yiyi-27">数组的维数</span></dd>
<dt><span class="yiyi-st" id="yiyi-28"><code class="xref py py-obj docutils literal"><span class="pre">ndarray.shape</span></code></span></dt>
<dd><span class="yiyi-st" id="yiyi-29">数组的维数</span></dd>
<dt><span class="yiyi-st" id="yiyi-30"><code class="xref py py-obj docutils literal"><span class="pre">ndarray.size</span></code></span></dt>
<dd><span class="yiyi-st" id="yiyi-31">数组中的元素数</span></dd>
</dl>
</div>
<p class="rubric"><span class="yiyi-st" id="yiyi-32">例子</span></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">a</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">([[</span><span class="mi">1</span><span class="p">,</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">],[</span><span class="mi">4</span><span class="p">,</span><span class="mi">5</span><span class="p">,</span><span class="mi">6</span><span class="p">]])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">size</span><span class="p">(</span><span class="n">a</span><span class="p">)</span>
<span class="go">6</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">size</span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="mi">1</span><span class="p">)</span>
<span class="go">3</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">size</span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="mi">0</span><span class="p">)</span>
<span class="go">2</span>
</pre></div>
</div>
</dd></dl>
